ath9k_htc: Add a debugfs file showing endpoint status

Location: ath9k_htc/phy#/queue

Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 55 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/htc.h b/drivers/net/wireless/ath/ath9k/htc.h
index b9c7bec9dd45..b40753ca6706 100644
--- a/drivers/net/wireless/ath/ath9k/htc.h
+++ b/drivers/net/wireless/ath/ath9k/htc.h
@@ -339,6 +339,7 @@ struct ath9k_debug {
         struct dentry *debugfs_xmit;
         struct dentry *debugfs_recv;
         struct dentry *debugfs_slot;
+        struct dentry *debugfs_queue;
         struct ath_tx_stats tx_stats;
         struct ath_rx_stats rx_stats;
         u32 txrate;
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_debug.c b/drivers/net/wireless/ath/ath9k/htc_drv_debug.c
index 119cc544cea0..961bec20d140 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_debug.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_debug.c
@@ -279,6 +279,53 @@ static const struct file_operations fops_slot = {
         .llseek = default_llseek,
 };
 
+static ssize_t read_file_queue(struct file *file, char __user *user_buf,
+                               size_t count, loff_t *ppos)
+{
+        struct ath9k_htc_priv *priv = file->private_data;
+        char buf[512];
+        unsigned int len = 0;
+
+        len += snprintf(buf + len, sizeof(buf) - len, "%16s : %3d\n",
+                        "Mgmt endpoint", skb_queue_len(&priv->tx.mgmt_ep_queue));
+
+        len += snprintf(buf + len, sizeof(buf) - len, "%16s : %3d\n",
+                        "Cab endpoint", skb_queue_len(&priv->tx.cab_ep_queue));
+
+        len += snprintf(buf + len, sizeof(buf) - len, "%16s : %3d\n",
+                        "Data BE endpoint", skb_queue_len(&priv->tx.data_be_queue));
+
+        len += snprintf(buf + len, sizeof(buf) - len, "%16s : %3d\n",
+                        "Data BK endpoint", skb_queue_len(&priv->tx.data_bk_queue));
+
+        len += snprintf(buf + len, sizeof(buf) - len, "%16s : %3d\n",
+                        "Data VI endpoint", skb_queue_len(&priv->tx.data_vi_queue));
+
+        len += snprintf(buf + len, sizeof(buf) - len, "%16s : %3d\n",
+                        "Data VO endpoint", skb_queue_len(&priv->tx.data_vo_queue));
+
+        len += snprintf(buf + len, sizeof(buf) - len, "%16s : %3d\n",
+                        "Failed queue", skb_queue_len(&priv->tx.tx_failed));
+
+        spin_lock_bh(&priv->tx.tx_lock);
+        len += snprintf(buf + len, sizeof(buf) - len, "%16s : %3d\n",
+                        "Queued count", priv->tx.queued_cnt);
+        spin_unlock_bh(&priv->tx.tx_lock);
+
+        if (len > sizeof(buf))
+                len = sizeof(buf);
+
+        return simple_read_from_buffer(user_buf, count, ppos, buf, len);
+
+}
+
+static const struct file_operations fops_queue = {
+        .read = read_file_queue,
+        .open = ath9k_debugfs_open,
+        .owner = THIS_MODULE,
+        .llseek = default_llseek,
+};
+
 int ath9k_htc_init_debug(struct ath_hw *ah)
 {
         struct ath_common *common = ath9k_hw_common(ah);
@@ -317,6 +364,12 @@ int ath9k_htc_init_debug(struct ath_hw *ah)
         if (!priv->debug.debugfs_slot)
                 goto err;
 
+        priv->debug.debugfs_queue = debugfs_create_file("queue", S_IRUSR,
+                                                        priv->debug.debugfs_phy,
+                                                        priv, &fops_queue);
+        if (!priv->debug.debugfs_queue)
+                goto err;
+
         return 0;
 
 err:
@@ -329,6 +382,7 @@ void ath9k_htc_exit_debug(struct ath_hw *ah)
         struct ath_common *common = ath9k_hw_common(ah);
         struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *) common->priv;
 
+        debugfs_remove(priv->debug.debugfs_queue);
         debugfs_remove(priv->debug.debugfs_slot);
         debugfs_remove(priv->debug.debugfs_recv);
         debugfs_remove(priv->debug.debugfs_xmit);